<template>
    <div class="sidebar">
        <el-menu class="sidebar-el-menu" :default-active="onRoutes" :collapse="collapse" background-color="#324157"
                 text-color="#bfcbd9" active-text-color="#20a0ff" unique-opened router>
            <template v-for="item in menus">
                <template v-if="item.subs">
                    <el-submenu :index="item.index" :key="item.index">
                        <template #title>
                            <i  :class="item.icon"></i>
                            <span>{{ item.title }}</span>
                        </template>
                        <template v-for="subItem in item.subs">
                            <el-submenu v-if="subItem.subs" :index="subItem.index" :key="subItem.index">
                                <template #title>{{ subItem.title }}</template>
                                <el-menu-item v-for="(threeItem, i) in subItem.subs" :key="i" :index="threeItem.index">
                                    {{ threeItem.title }}</el-menu-item>
                            </el-submenu>
                            <el-menu-item v-else :index="subItem.index" :key="subItem.index">{{ subItem.title }}
                            </el-menu-item>
                        </template>
                    </el-submenu>
                </template>
                <template v-else>
                    <el-menu-item :index="item.index" :key="item.index">
                        <i :class="item.icon"></i>
                        <template #title>{{ item.title }}</template>
                    </el-menu-item>
                </template>
            </template>
        </el-menu>
    </div>
</template>

<script>
export default {
    name: "Sidebar",
    data(){
      return{
          menus:[
              {
                  icon: "el-icon-s-home",
                  index: "/home",
                  title: "系统首页",
              },
              {
                  icon: "el-icon-s-home",
                  index: "/table",
                  title: "基础表格",
              },
              {
                  icon: "el-icon-s-home",
                  index: "/tabs",
                  title: "tab选项卡",
              },
              {
                  icon: "el-icon-s-home",
                  index: "3",
                  title: "表单相关",
                  subs: [
                      {
                          index: "/form",
                          title: "基本表单",
                      },
                      {
                          index: "/upload",
                          title: "文件上传",
                      },
                      {
                          index: "4",
                          title: "三级菜单",
                          subs: [
                              {
                                  index: "/editor",
                                  title: "富文本编辑器",
                              },
                          ],
                      },
                  ],
              },
              {
                  icon: "el-icon-s-home",
                  index: "/icon",
                  title: "自定义图标",
              },
              {
                  icon: "el-icon-s-home",
                  index: "/charts",
                  title: "schart图表",
              },
              {
                  icon: "el-icon-s-home",
                  index: "/i18n",
                  title: "国际化功能",
              },
              {
                  icon: "el-icon-s-home",
                  index: "7",
                  title: "错误处理",
                  subs: [
                      {
                          index: "/permission",
                          title: "权限测试",
                      },
                      {
                          index: "/404",
                          title: "404页面",
                      },
                  ],
              },
              {
                  icon: "el-icon-s-home",
                  index: "/donate",
                  title: "支持作者",
              },
          ]
      }
    },
    computed:{
        onRoutes(){
            return this.$route.path;
        },
        collapse(){
            return this.$store.state.collapse;
        }
    }
}
</script>

<style scoped>

.sidebar {
    display: block;
    position: absolute;
    left: 0;
    top: 70px;
    bottom: 0;
    overflow-y: scroll;
}
.sidebar::-webkit-scrollbar {
    width: 0;
}
.sidebar-el-menu:not(.el-menu--collapse) {
    width: 250px;
}
.sidebar > ul {
    height: 100%;
}
</style>